They're impossible to categorize, which is in part why I love them. They're from Iceland, and a lot of the lyrics are sung in an invented language called "Hopelandic", which is apparently based on viking poetry.

They play conventional instruments in an unconventional way, playing the guitar with a cello bow and the bass with a drumstick. Learn more about them here on their official website. I also recommend hitting the media page, and snagging all of the music and videos - they're all amazing. The site is quite extensive, I spend hours at a time on it. Let me know what you think!